Improvement in planing-machines



2 Sheets--Sheet 1 W. H.. DUANE Planing-Machines. No. 155,431. PatentedSept. 29,1874.

I E {gave-later UNITED STATES PATENT OFFICE.

WILLIAM H. DOANE, OF CINCINNATI, OHIO.

IMPROVEMENT IN PLANlNG-MACHINES.

Specification forming part of Letters Patent No. 155,431, datedSeptember 29. 1874; application filed February 6,1874.

To all whom. it may concern:

Be it known that I,WILLIA1VI H. DOANE, of Cincinnati, Hamilton county,State of Ohio, have invented a new and useful improvement inFlooring-Machines, of which the following is a specification:

My invention relates to machines designed to plane the edges offlooring-boards, and cut therein the tongue and groove peculiar toflooring-boarcls; and my invention consists, first, in the provision andcombination of three outter-heads, between the central and outer ones ofwhich two flooringboards may be run and out at one and the same time;secondly, in a peculiar construction and arrangement of the gear-wheels,by which the expansible rolls are driven, that permits wheels of largerdiameter than the diameter of the feed-rolls to be used; thirdly, insuch a con struction of the upper feed-rolls and their elevating devicesthat the central journals of these upper feed-rolls are independent andadapted for separate vertical movement, so

l that two boards of unequal thickness can be fed properly.

Figure l is a perspective view of a machine embodying my invention. Fig.2 is an elevation of the expansihle-roll gear-wheels. Fig. 3 is anelevation of the journal device for the inner ends of the upperfeed-rollers.

A frame of ordinary construction, marked A in the drawing, is provided,in suitable journal-boxes, of which three cutter-spindles are journaledvertically, the cutter-heads B G D of which are provided with cuttersfor tongueing and grooving, as shown in Fig. 1. Between the cutter-headsB G and O 1) two boards are designed to be fed and cut at one and thesame time, the boards being properly guided between the central strips Eand adjustable gages F G which swing and H I which slide. Thecutter-spindles are driven by belting from the driving-shaft of themachine in the usual way, over pulleys J. The lower feedrollers L areboth upon one shaft, and the upper feed-rollers are upon separateshafts, the journals of the separate shafts meeting in the center of themachine. Between the rollers K and the lower feed-rollers L the twoseparate boards are fed to the cutters, the friction of the rollers andrevolution of the same serving to force the boards between the cutters.As is customary, the upper rollers are attached by suitable means toweighted levers M, which serve to press these rollers down tightly uponthe boards. The rollers K are journaled in sliding boxes N, which areraised and lowered by screws 0, beveled gearing P, and hand-crank Q, thescrews being fitted to the gearing by feathering connections customaryto permit the weighted levers to move the slides N independent of thegearing to limited extent. Three single wheels and one double wheel areused at each end of the feed-rollers to drive the same so as to permitexpansion or contraction of the distance between the feed-rollers. Thesingle wheels are marked R S T, and the double wheel U. The wheels R Tare upon the shafts of the feed-rollers, and a double wheel, U, upon astud, V, secured to the frame of the machine. The double wheel revolvesloosely upon the stud, and upon this same stud a link, W, is attached,which carries a stud for the wheel S, the wheel S being linked to thewheel R by link X. In the expansion of the rolls the wheel R moves in avertical path, as shown in dotted lines X X, and the wheel S in a curvedpath, shown in dotted lines X X in Fig. 2.

It will be seen in reference to Fig. 1 that the wheel S connects to theinside part of the double wheel U, while the wheel T connects to theouter side. This arrangement, however, can be reversed, and its purposeis to permit the periphery of wheel R to pass below the periphery ofwheel T, so that While the feed-rollers can berun close together, thewheels R T can be of larger diameter than the diameter of thefeed-rollers, and consequently of greater power than gear-wheels whichare all in line, and necessarily smaller in diameter than thefeed-rollers. The inner ends of feedrollers K are separately journaledto boxes a, which are slotted vertically, and secured to a single slide,N, the slots permitting the independent vertioal movement of each box a,and consequently permitting the rollers K to feed at the same timedifferent thicknesses of boards.

The boxes at are kept to their work by powerful springs b, which areheld in place by setscrews-or pins 0.

I am aware that it is not new to drive the feed-rolls of amolding-machine by a train of gearing so combined that thedriving-Wheels on the respective feed-rolls may be larger than thediameter of either of the latter by passing each other. My improvementof this feature is limited to the peculiar devices employed.

I claim- 1. The combination of the three cutter-heads, B O D, in aflooring-machine, substantially in the'manner and for the purposespecified.

2. The combination of feed-rollers K L, sliding journal-boxes N,gear-Wheels R T, linked gear-Wheels S X W, and double-faced gear-WILLIAM H. DOANE.

Witnesses J. L. WARTMANN, PHIL. G. WEATHERBY.

